Weight converter
Grams to Kilograms
Converting Grams to Kilograms is a single multiplication when you know the factor. One g equals 0.001 kg, so multiply the value in g by 0.001. The calculator below works in both directions and accepts decimals.
Formula 1 g = 0.001 kg
Need the other direction? Kilograms to Grams.
How to convert Grams to Kilograms
The gram is one thousandth of a kilogram and is common in cooking and chemistry. The kilogram is the SI base unit of mass; since 2019 it is defined by the Planck constant.
To convert Grams to Kilograms, multiply the value in g by 0.001. For example, 10 g × 0.001 = 0.01 kg. This works because the ratio between the two units is constant for every value in weight.
Worked examples
| g | kg |
|---|---|
| 1 g | 0.001 kg |
| 2.5 g | 0.0025 kg |
| 5 g | 0.005 kg |
| 10 g | 0.01 kg |
| 25 g | 0.025 kg |
| 50 g | 0.05 kg |
| 100 g | 0.1 kg |
Reverse conversion
| kg | g |
|---|---|
| 1 kg | 1,000 g |
| 5 kg | 5,000 g |
| 10 kg | 10,000 g |
| 25 kg | 25,000 g |
| 50 kg | 50,000 g |
| 100 kg | 100,000 g |
When this conversion is useful
This is the calculation you need when you are comparing body weight, shipping weight or a recipe across metric and imperial units. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 g is 1 kg.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
g to kg conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Grams (g) | Kilograms (kg) |
|---|---|
| 1 g | 0.001 kg |
| 2 g | 0.002 kg |
| 3 g | 0.003 kg |
| 4 g | 0.004 kg |
| 5 g | 0.005 kg |
| 6 g | 0.006 kg |
| 7 g | 0.007 kg |
| 8 g | 0.008 kg |
| 9 g | 0.009 kg |
| 10 g | 0.01 kg |
| 11 g | 0.011 kg |
| 12 g | 0.012 kg |
| 13 g | 0.013 kg |
| 14 g | 0.014 kg |
| 15 g | 0.015 kg |
| 16 g | 0.016 kg |
| 17 g | 0.017 kg |
| 18 g | 0.018 kg |
| 19 g | 0.019 kg |
| 20 g | 0.02 kg |
| 21 g | 0.021 kg |
| 22 g | 0.022 kg |
| 23 g | 0.023 kg |
| 24 g | 0.024 kg |
| 25 g | 0.025 kg |
| 26 g | 0.026 kg |
| 27 g | 0.027 kg |
| 28 g | 0.028 kg |
| 29 g | 0.029 kg |
| 30 g | 0.03 kg |
| 31 g | 0.031 kg |
| 32 g | 0.032 kg |
| 33 g | 0.033 kg |
| 34 g | 0.034 kg |
| 35 g | 0.035 kg |
| 36 g | 0.036 kg |
| 37 g | 0.037 kg |
| 38 g | 0.038 kg |
| 39 g | 0.039 kg |
| 40 g | 0.04 kg |
| 41 g | 0.041 kg |
| 42 g | 0.042 kg |
| 43 g | 0.043 kg |
| 44 g | 0.044 kg |
| 45 g | 0.045 kg |
| 46 g | 0.046 kg |
| 47 g | 0.047 kg |
| 48 g | 0.048 kg |
| 49 g | 0.049 kg |
| 50 g | 0.05 kg |
| 60 g | 0.06 kg |
| 70 g | 0.07 kg |
| 80 g | 0.08 kg |
| 90 g | 0.09 kg |
| 100 g | 0.1 kg |
Frequently asked questions
How many Kilograms are in 1 Grams?
1 g equals 0.001 kg.
How do I convert Grams to Kilograms?
Multiply the g value by 0.001. Example: 25 g = 0.025 kg.
What is 2.5 g in kg?
2.5 g = 0.0025 kg.
Is the g to kg conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.